Fig. 6.

Photomicrographs of chicken duodenum sections stained with hematoxylin and eosin. Alcian Blue was used to stain goblet cells. A) Normal histological duodenum structure of non-challenge treatment (NC) (200X); B) Challenged treatment (CH) (200x) 1. Inflammatory cell infiltration in the lamina propria; 2. Congestion and 3. Inflammatory cell infiltration in the epithelium; These alterations contributed to the highest ISI index (P< 0.05) in coccidiosis challenged group at 28 days in comparison to the non-challenged group.